Concrete erection and stripping system



July 20, 1 E. s. KLAUSNER 3,

CONCRETE ERECTION AND STRIPPING SYSTEM Filed Sept. 7, 1961 2 Sheets-Sheet 2 ATTORNEY United States Patent 3,195,209 CONCRETE ERECTION AND STRIPPING SYSTEM Edward S. Klausner, 7 E. 47th St, New York, N.Y. Filed Sept. 7, 1961, Ser. No. 136,588 4 Claims. (Cl. 25-1315) The present invention relates to a concrete erection and stripping system, and it particularly relates to a novel accessory system for concrete forms and particularly for facilitating the erection and stripping of concrete forms and making floors for the building industries.

Although not limited thereto, the present invention will be particularly described in a system for supporting floors or ceilings of cast material, such as concrete, gypsum or other cementitious materials, in which the bottom supports will be made of a flat rigid sustaining sheet, such as plywood or other materials which are detachably secured to metal or concrete beams.

It is among the objects of the present invention to provide a novel floor construction system in which thin-slab floor constructions may be readily supported in casting operations upon either steel I beams, open web joists or concrete joists, with great saving in material, time and labor.

Another object is to provide a rigid, lightweight economical floor construction system for all types of J and L junior beams and I beams, as well as open web joists and precast concrete beam in which the floors may be more readily and quickly poured, with a minimum of labor, in various spacings of flange to flange, wit-h ready removal, after the floor has been poured, of the supporting or forming members.

Still further objects and advantages will appear in the more detailed description set forth below, it being understood, however, that this more detailed description is given by way of illustration and explanation only and not by way of limitation, since various changes therein may be made by those skilled in the art without departing from the scope and spirit of the present invention.

In accomplishing the above objects, it has been found most satisfactory, according to one embodiment of the present invention, to form a clip system which will be readily supported on the top of I beam or even I and L junior beams, and which will have depending supporting side structures to support plywood panels or forms on each side of the beam construction.

In connection with open web joists, it is necessary to have an inside supporting leg which will be inserted between the open webs of the joists and which will have an outstanding flange member to support the plywood or other forming panels, forming a bottom support.

As an alternative form of the invention, a U-shaped clip member may be provided for inserting over and engaging the flanges, and a hook may be applied thereto to enable extra engagement or detachment by means of a wire or other type of connection.

It is also possible to have support members which would extend downwardly alongside of the beams or joists and which would give an assurance of satisfactory support of the panels upon which the concrete is cast or poured.

With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described, and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views:

FIG. 1 is a side sectional view of a form of supporting See clipping construction in which a U-shaped member is employed with one leg positioned between an open web joist and another web utilized to support a forming panel.

FIG. 2 is a side perspective view of one of the clips of FIG. 1 in enlarged view removed from the open web joist of FIG. 1.

FIG. 3 is a side sectional view showing an alternative form of clip which does not extend over the entire top or head of the junior or I and L junior beam or I beam, but which has a U-shaped engagement extending over the edge of the top flange member of an I beam, with an additional hook member for support if needed and is held in position by a wire attachment.

FIG. 4 is a side perspective view, showing the clip arrangement of FIG. 3 removed from the assembly of FIG. 3 and upon an enlarged scale.

FIG. 5 is a fragmentary transverse sectional view similar to FIG. 1 showing the different type of clip from that shown in FIGS. 1 and 2.

FIG. 6 is a transverse side sectional view of an I beam construction in which the concrete extends down beyond the top of the flange of the I beam in between varying clips which are indicated in dotted lines.

FIG. 7 is a transverse sectional view similar to FIGS. 1, 3 and 6 in which a double sided clip is utilized.

FIG. 8 is a side perspective view of the clip of FIG. 7 removed from the structure on which it is mounted showing in larger scale the detailed conformation thereof.

FIG. 9 is a fragmentary perspective view showing the manner of mounting the clips along the run of special beam construction of the web joist type.

. FIG. 10 is a fragmentary top perspective view of a similar structure as indicated in FIG. 9 showing the manner of attaching the clips to an alternative web joist construction.

FIG. 11 is a fragmentary perspective view showing the manner in which the clips are mounted along the run of an I beam construction with the'cross section of FIG. 6 being taken at an intermediate portion after the concrete has been poured and the plywood panels have been removed.

Referring to FIGS. 1 and2, the clip A is designed to be secured on top of the open web joist system B to support the plywood form C upon which the concrete floor D may be poured.

These open web joists will have two upper angle mem' bers and 21 and two lower angle members 22 and 23.

Between the upper vertical flanges 24 and 25 and the lower flanges 26 and 27 are placed the oblique connection supporting members or bar elements 28.

The clip member A desirably has a long depending leg 29 with an out-turned edge 30, which edge 30 will contact and fill up the space between the flanges 24 and 25, as shown in FIG. 1.

The inside face 31 of the clip A of FIG. 2 will rest closely against the inside face of the flange 25.

The horizontal crossed member 32 will be positioned on top of the horizontal member 33 of the angle 21, whereas the vertical down-turned portion 34 will support the short horizontal flange 35 upon which the edge 36 of the plywood panel C rests.

These clips A of FIG. 2 may be of a frangible cast iron so that the horizontal flange 35 may be readily broken off by a crowbar or other similar type of tool, or if of a sort, relatively pliable metal or material, the elements 35 may be bent out of the way and sheared off so that the plywood panel C may be readily removed and re-used.

The clips A may also be made of plastic material and are desirably of such thickness and reinforcement as to have a tensile strength of about 20,000 pounds per square inch and a low resistance to shock.

Preferably the wedge or flange 35 will break off where cast iron is used if a hammer blow is applied to the side thereof after the floor D has been cast or formed.

The top flanges 32, as shown in FIG. 3, will be embedded in the concrete floor structure D and will form part of the permanent building structure. The residual element of the clip will forrnan important part of the re inforcement of the entire building structure.

In the form shown in FIGS. 3 and 4, the clip E may be inserted into the upper part of the I bean P to support the plywood panels G upon, which. the floor structure H i may be cast or poured.

Desirably, the horizontal pair of lugs 45 and as areso.

spaced as to tightly grip the flange 47 of the I beam F and there may be suflicient resiliency between the horizontal portions 45 and 46 to give a tight wedging fit.

Both these lugs extend laterally outwardly from one side of the main vertical web member 47.

At the other side and the lower end of theweb member 37 is the oppositely extending lug member 48, which supports the end 49 of the plywood or other forming or molding panel. 7

Where the lugs 45 and 46 are not sutlicient in themselves to grip the edge of the top flange 47, a hook member may be provided which canbe wired at 1% in po-.

sition or otherwise attached to the beam structure F.

Here, too, in the construction shown in FIGS. 2 and 4,

the horizontal member 48 may be broken or bent away,

or sheared oil to remove the plywood or other panels G Both clips A and E will belight in weight, readily] molded or cast, small in size and inexpensive to manufacture.

In the form shown in FIG. 5, the, turned out end 1M .I

will fit under the lowered end 102 of one of the web joisted angle sections 163.

It will be noted that the concrete 104 will seal the top leg of the clip M in position with the leg 166 extending down through the open space 1%? between the vertical flanges 103 of the web shaped elements 193.

The outstanding lip 16? may be broken oil to permit release of the plywood panels upon which the concrete tile is cast.

The cross section as shown in FIG. 6 is derived from a clip arrangement shown in FIG. with a section of 6 being taken at 6-6 of FIG. 10.

In this instance an I beam N is employed having an up. per flange P which carries the clips Q having the attachment hooks R and the outstanding plywood supporting li s S.

These clips are alternated from side to side along the run of the beam, and they will hold the plywood panels T as shown in FIG. 6.

The concrete 120 will extend to the surface 121 which it is noted is below the top face 122 of the I beam.

The hook members R will alternately engage opposite edges of the I beam by having the top flange embedded in the recesses in the concrete as shown in FIG. 6. A

composite action beam is achieved in which the top of the I beam being embedded in the recesses in the concrete in eliect has its top flange extended so that the concrete acts as an extension thereof..

This will give a to increase in strength.

In the form shown in FIG. 9, there will be two open web angular elements 156) at the top and 151 at the bottom which are joined together by the sinuous rod 152 spot welded to the opposite vertical flanges 153 and 154 at the bends 155 and 156.

The clips 157 may be of the same construction as set forth in connection with FIGS. 1 and 2, and they have l the outstanding lips 158 which support plywood panel elements and the out-turned shortedges 159 which lodge between or in the open spaces 160 or below the edges of the vertical flanges as shown in FIG. 5.

in the, embodiment of FIG. 10, there is an upper web ioisted channel member and a lower inverted channel joiste-d'member 176 both having the center, channel 177 and 17S and the outstanding edge flanges 1'79 and 18%.

The channels 177 and 173 connect by means of sinuous rod 138 which is welded thereto at 181 at the bend 132.

The clips 1 33 may be mounted along the run thereof alternately so that the hooks 134' are first attached on one side and then on the other and with the plywood supporting lip 18-5 first projecting on one side and then on the other.

A prying tool may be'readily inserted to remove the horizontal lip elements lfiS and 135m permit removal of the plywood panels after casting of the concrete.

In the form shown in FIGS. 7 and 8, the clip is illustrated as applied to a precast concrete joist. The clip R has the horizontal base structure 9% with the depending side legs 91 and the-outstanding horizontal flanges 92.

These horizontal flanges are reinforced by means of the extra metal at the round 93.

The clips R will snugly fit on top of the enlarged portion 94 of the precast concrete joist 95 and the outstanding fianges 92 will support the form panels S, upon which in turn the floor T may be poured.

The rounds 89 will assist in mounting and prevent cocking.

All of these clip structures will facilitate the erection and stripping of concrete forms for the building industry and they will readily support floors or ceilings of any cast material, whether concrete, gypsum or other cementitious products.

The forms S and T may be made of metal, wood, or preferably plywood, and they can be readily used or re-used by bending down, shearing or breaking the short supporting fiangesSfi, d8, 92 and 185. I

By the use of these clips A, E, 11,157 and 183, it is possible to eliminate the use of steel wires or. other expensive structures.

To support the panels C, G and S, it is not necessary to resort to any who or metal-bending operations on location, nor is it necessary to cut or remove any complicated wiring arrangements to remove the panels C, G and S after casting or pouring of the floors.

The entire structure thus forms a most convenient and effective method of erection. and stripping, with a wide variety of various beam structures.

The forms will be automatically centered and the clips will automatically engage and adjust themselves to the tops of the web or I or concrete beams or joists.

As many changes could be made in the above concrete erection and stripping ssytem, and many widely different embodiments of. this invention could be madewithout departure from the scope of the claims, it is intended that allrnatter contained in the above descriptionshall be interpretedas illustrative and not in a limiting sense.

Having now particularlydescribed and ascertained the nature of the invention, and in what manner the same is to be performed, what is claimed is:

1. In combination with a flanged structural member, a structural clip of frangible material supported thereby comprising means for interconnecting a horizontal forming member temporarily with the flange of said structural member, said means consisting of a vertical web having a pair of spaced short lugs extending laterally in one direction from said vertical web partially embracing one of said members, and a single. lug of a length comparable to that of said first-mentioned lugs and extending laterally in the opposite direction for engaging the other one of said members, one of said lugs adapted to be fractured from said web by a hammer blow to break the temporary connection between said members.

2. In combination with a flanged structural member, a structural clip of frangible material supported thereby comprising means for interconnecting a horizontal forming member temporarily with the flange of said structural member, said means consisting of a vertical web having a pair of spaced short lugs extending laterally in one direction from said vertical web partially embracing the edge of the flange of said structural member, and a single lug of a length comparable to that of said first-mentioned lugs and extending laterally in the opposite direction for supporting the edge of said forming member, said lastmentioned single lug adapted to be fractured from said web by a hammer blow to break the support for said forming member.

3. In combination with a flanged structural steel member, a plurality of cast iron structural clips spaced along the length thereof and supported thereby adjacent to the edge of the flange of said member, each clip comprising means for interconnecting a horizontal forming member temporarily with said flange of said structural member, said means consisting of a vertical web having a pair of spaced superposed short lugs extending laterally in one direction from said vertical web partially embracing said edge of said flange, and a single lug of a length comparable to that of said first-mentioned lugs extending 25 laterally in the opposite direction for supporting the bottom of said forming member at the edge thereof adjacent to said edge of said flange, said last-mentioned single lug adapted to be fractured from said web by a hammer blow to break the support for said forming member.

4. An assembly as set forth in claim 3 wherein the upper lug of said pair of superposed lugs is provided with a hook facing the edge of said flange whereat the clip is supported, and a Wire connector between said hook and the opposite edge of said flange.

References Cited by the Examiner UNITED STATES PATENTS 576,770 2/97 Abbott 50282 681,969 9/01 ONeil 50282 920,787 5/09 Sullivan 25-131 1,928,748 10/33 Young 50282 2,218,820 10/40 Hillberg 25-131.5 2,731,701 1/56 Klausner 50283 3,060,641 10/62 Lockwood 5083 FOREIGN PATENTS 1,047,910 7/53 France.

OTHER REFERENCES The Magazine of Building, December 1950, page 115, copy in 50282.

FRANK L. ABBOTT, Primary Examiner.

JACOB L. NACKENOFF, HENRY C. SUTHERLAND,

Examiners. 

1. IN COMBINATION WITH A FLANGED STRUCTURAL MEMBER, A STRUCTURAL CLIP OF FRANGIBLE MATERIAL SUPPORTED THEREBY COMPRISING MEANS FOR INTERCONNECTING A HORIZONTAL FORMING MEMBER TEMPORARILY WITH THE FLANGE OF SAID STRUCTURAL MEMBER, SAID MEANS CONSISTING OF A VERTICAL WEB HAVING A PAIR OF SPACED SHORT LUGS EXTENDING LATERALLY IN ONE DIRECTION FROM SAID VERTICAL WEB PARTIALLY EMBRACING ONE OF SAID MEMBERS, AND A SINGLE LUG OF A LENGTH COMPARABLE TO THAT OF SAID FIRST-MENTIONED LUGS AND EXTENDING LATERALLY IN THE OPPOSITE DIRECTION FOR ENGAGING THE OTHER ONE OF SAID MEMBERS, ONE OF SAID LUGS ADAPTED TO BE FRACTURED FROM SAID WEB BY A HAMMER BLOW TO BREAK THE TEMPORARY CONNECTED BETWEEN SAID MEMBERS. 